A dying sea.
A deserted rookery.
A mysterious visitor who arrives in the night.
Little Goose Island has weathered storms, secrets, curses, and ghosts, but now Tess MacKay faces a threat unlike anything Wendover House has seen before.
A strange plague has come to the islands. Fish are dying in the water. Puffins are abandoning their nesting grounds. The sea itself seems poisoned, and the people of Little Goose Island are beginning to fear that something unnatural has been set loose.
Tess suspects the disturbance is not merely environmental, but supernatural. When a strange visitor appears in the night offering help, she is forced to decide whether to trust an unknown ally-or face the growing danger alone.
What Tess uncovers is far more dangerous than a local mystery. The islands are under threat, and if she cannot discover the source of the plague in time, Little Goose Island may lose more than its wildlife.
With Wendover House once again at the heart of the mystery, Tess must follow the clues through haunted waters, old secrets, and forces that may not belong to the natural world.
Mysterious Island is the fifth book in Melanie Jackson's Wendover House Cozy Mystery Series, a gothic-tinged cozy mystery filled with island atmosphere, supernatural danger, strange visitors, ecological mystery, and secrets rising from the dark Maine coast.